Infant, NewbornMothersPregnancyInfant, PrematureInfant CareInfant FoodInfant, Premature, DiseasesInfant BehaviorInfant FormulaBreast FeedingInfant MortalityMother-Child RelationsInfant, Newborn, DiseasesSudden Infant DeathInfant Nutritional Physiological PhenomenaInfant, Very Low Birth WeightInfant WelfareInfectious Disease Transmission, VerticalInfant, Low Birth WeightChild DevelopmentBirth WeightGestational AgeMaternal-Fetal ExchangeBottle FeedingFathersPregnancy ComplicationsCryingInfant, Extremely Low Birth WeightPregnancy Complications, InfectiousInfant, Small for Gestational AgePrenatal Exposure Delayed EffectsMilk, HumanMaternal AgeInfant, Extremely PrematurePostnatal CareIntensive Care Units, NeonatalSurrogate MothersInfant Nutrition DisordersRisk FactorsDepression, PostpartumPrenatal CarePregnancy OutcomeMaternal WelfareMaternal ExposureLactationSingle ParentFetal BloodDevelopmental DisabilitiesProspective StudiesSocioeconomic FactorsCohort StudiesObject AttachmentPregnancy in DiabeticsDelivery, ObstetricPerinatal CareImmunity, Maternally-AcquiredTime FactorsPremature BirthCongenital AbnormalitiesParityLongitudinal StudiesRespiratory Distress Syndrome, NewbornParentsChild RearingFetal DeathAge FactorsBronchopulmonary DysplasiaQuestionnairesBirth CertificatesTerm BirthDiarrhea, InfantileFollow-Up StudiesChild of Impaired ParentsGrowthIncubators, InfantMilkMaternal-Child Health CentersMaternal Nutritional Physiological PhenomenaIntensive Care, NeonatalPregnancy in AdolescenceEducational StatusParent-Child RelationsNeonatal ScreeningInfant EquipmentColicUnited StatesFetusCesarean SectionBedsProne PositionCase-Control StudiesHIV InfectionsAnimals, NewbornChild CareRetrospective StudiesTemperamentBody WeightPregnancy Trimester, ThirdCross-Sectional StudiesEnterocolitis, Necrotizing